REFRACTORIES FOR HANDLING STEEL OUTSIDE A FURNACE
V. Ya. Sakulin,
V. P. Migal’,
A. P. Margishvili,
and V. V. Bulin
Translated from Novye Ogneupory, No. 9, pp. 29 – 35, September, 2008.
Original article submitted April 14, 2008.
A range of refractories is presented for handling steel outside a furnace, which are produced by the Borovichi
Refractories Corporation. The refractory characteristics and working features are given.
The Borovichi Refractories Corporation has for more
than 150 years produced a wide range of high-grade
refractories for various industries: metallurgical, glass, petro
chemical, and so on. Intensified steel casting has led recently
to a considerable tightening of the specifications from metal
lurgists for the qualitative parameters of refractories. The
new generation of refractories should have high performance
as regards mechanical strength, erosion and corrosion resis-
tance under working conditions in hot media of various types
(molten metals, slags, and so on), and wear resistance, in-
cluding under hydrodynamic conditions, in addition to ther-
mal stability and so on.
One current requirement is for sets of refractories for
metallurgical plant: the Borovichi Refractories Corporation
provides comprehensive sets of refractories for steel pouring
(Fig. 1): refractories for heat installation, reinforcement, and
working layers; funnels for top blowing of the metal with ox-
ygen or inert gases, and for injecting powder reagents;
pierced blocks for bottom injection of inert gases; refrac
tories for pouring the metal from steel-pouring ladles; shaped
blocks; and steel-pouring ladles; and also plates for gate
seals and collector vessels.
Refractories for insulating steel-pouring ladles. Ama
jor priority task in economics is resource sparing. Efficient
hot thermal insulation materials reduce the material capacity
of thermal equipment and save fuel by reducing the unpro
ductive heat losses to the surroundings. This has led to re
search on new thermal insulating materials. In spite of the
differences in the raw materials and technologies for making
light thermal insulators, those made in the research center at
the corporation have the following features in common:
– hard nonplastic and inelastic highly porous material;
– the lack of glass-fiber materials in the free or bound
state results in good ecological qualities;
– thermal stability and volume constancy on account of
the lack of phase transformations in the entire working tem
– finely divided refractory material provides good
strength with low apparent density; and
– low thermal conductivity as a consequence of the high
At present, the corporation has put in hand the produc-
tion of six forms of heat insulating refractories with alumino-
silicate compositions. Good values have been attained for the
apparent density and thermal conductivity. The values at-
tained for the strength in compression (Table 1) enable one to
use these light refractory materials for the heat insulating
layers of steel-pouring ladles, including large ones.
Refractories for the reinforcement layer in steel-
pouring ladles. Traditionally the corporation has produced a
complete list of aluminosilicate refractories ranging from
firebrick to high-alumina ones by semidry and plastic form
ing (Table 2).
Refractories and Industrial Ceramics Vol. 49, No. 5, 2008
1083-4877/08/4905-0354 © 2008 Springer Science+Business Media, Inc.
Fig. 1. Lining for a steel pouring ladle: 1 ) thermal insulation; 2 )re
inforcement layer; 3 ) working layer; 4 ) concrete bottom; 5 ) encom
Borovichi Refractories Corporation, Borovichi, Novgorod Re